Roles and Access Control using the API

This is my first post and I am very new to Windchill and the API. I have a web interface I created that allows the user to create folders and documents. This is done using the API. For the life of me I can't seem to figure out how to manage the security thru the API. I read the portion of the WCBusAdminGuide.

Basically what I want to do is recreate what happens when you click "Manage Security" on a folder and add existing "Participant" using the API. Not sure if Participant and Role are synomonous in Winchill. I did not see any method AddRole in a ContainerTeam.

Any help would be appreciated.